24 C.F.R. § 203.21 Amortization provisions.
Title 24 - Housing and Urban Development
The mortgage must contain complete amortization provisions satisfactory to the Commissioner, requiring monthly payments by the mortgagor not in excess of his reasonable ability to pay as determined by the Commissioner. The sum of the principal and interest payments in each month shall be substantially the same.
Title 24: Housing and Urban Development
PART 203—SINGLE FAMILY MORTGAGE INSURANCE
Subpart A—Eligibility Requirements and Underwriting Procedures
Eligible Mortgages
§ 203.21 Amortization provisions.